Malicious PDF — malware analysis report

Static analysis result for SHA-256 51326f109432253d…

MALICIOUS

PDF

80.9 KB Created: 2021-02-26 07:33:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 5af7629585af9659f97e93c031913f0d SHA-1: 224b45fcbcdab2dde772ee6d5957dcf7bfd3b269 SHA-256: 51326f109432253de180e49081ca12c43cafac9563e28d2d5fa7e5b7ef205da1
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many of which are hosted on disposable domains and appear to be part of a link farm, suggesting a phishing or scam attempt. The primary URL, 'https://seumenha.ru/wix?keyword=apk+de+clash+of+clans+hackeado', directly indicates a lure for a hacked game application. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://seumenha.ru/wix?keyword=apk+de+clash+of+clans+hackeado PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4389601/normal_60336477421b0.pdfIn PDF document text
    • http://kosamaritaj.getenjoyment.net/89757453103.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481828/normal_601c01d85e329.pdfIn PDF document text
    • https://cdn.sqhk.co/jokawefezo/byuDIEL/15172674791.pdfIn PDF document text
    • http://lojapidabud.mypressonline.com/87305583895.pdfIn PDF document text
    • https://cdn.sqhk.co/vapezuwe/eheiaUl/boss_tu_80_tuner_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462352/normal_601212e08a611.pdfIn PDF document text
    • http://veselutut.mywebcommunity.org/mosugoxenunuzex.pdfIn PDF document text
    • http://dewisazovuvoxi.mywebcommunity.org/dremel_multipro_model_395_manual.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366407/normal_5ff2c708d8b19.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480876/normal_603366710fdef.pdfIn PDF document text
    • http://xogunajeraxuda.mywebcommunity.org/92621789102.pdfIn PDF document text
    • http://pogawubujogeje.mypressonline.com/too_lazy_or_too_lazy.pdfIn PDF document text
    • https://cdn.sqhk.co/mibemofega/fWHXYpw/nike_sports_bra_price_philippines.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477615/normal_602d9b343e2ff.pdfIn PDF document text
    • https://cdn.sqhk.co/nemuvefik/abjghc4/61444605164.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374698/normal_602be746a4b51.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462976/normal_5ffabfbc681a6.pdfIn PDF document text
    • http://winovigamaj.mygamesonline.org/all_souls_day_2020_catholic_date.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kujidexir.rf.gd/baldur_s_gate_enhanced_edition_apk_indir.pdfIn PDF document text
    • http://ruwimanolemagum.rf.gd/5589831058.pdfIn PDF document text
    • http://dazidotidipo.rf.gd/barely_lethal_movie_720p.pdfIn PDF document text
    • http://nejimafalun.onlinewebshop.net/most_romantic_latin_phrases.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF23 5200 bytes
SHA-256: 01493ce38ce186ff8f2486859f641151add022b8b71f105ec60ac4856407f70b
font_01_sfnt_off000110dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110DC 10840 bytes
SHA-256: 0a84b74b33182332edbca80886910333b00c24cbbb9deda65cf11416449e46ef

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